Should pre-operative troponin be a standard requirement in patients undergoing major lower extremity amputation?

Area of Science:

• Cardiology
• Vascular Surgery
• Clinical Diagnostics

Background:

• Major lower extremity amputation for critical limb ischemia carries significant perioperative cardiac risks.
• Identifying high-risk patients preoperatively is crucial for improving outcomes.

Purpose of the Study:

• To evaluate the clinical utility of routine pre-operative cardiac troponin I (cTnI) measurement.
• To determine if cTnI levels predict post-operative cardiac events in patients undergoing major lower extremity amputation.

Main Methods:

• Prospective, blinded observational study design.
• Recruitment of 44 patients undergoing lower extremity amputation without unstable coronary artery disease.
• Measurement of serum cTnI preoperatively, with 6-week post-operative cardiac event screening.

Main Results:

• Ten out of 44 patients experienced a post-operative cardiac event (non-fatal myocardial infarction or cardiac death).
• An elevated pre-operative cTnI level was the sole significant predictor of adverse post-operative cardiac events.
• Elevated cTnI was associated with a very poor outcome, including cardiac deaths and myocardial infarction.

Conclusions:

• Routine pre-operative cTnI measurement can identify patients at high risk for cardiac complications.
• This risk stratification may guide optimization of cardiac status or surgical deferral.
• Pre-operative cTnI serves as a valuable tool for managing perioperative cardiac risk in this patient population.